Check if given string can be split into four distinct strings

Given a string, the task is to check if we can split it into 4 strings such that each string is non-empty and different from the other.

Examples:

```Input : str[] = "geeksforgeeks"
Output : Yes
"geeks", "for", "gee", "ks" are four
distinct strings that can form from
given string.

Input : str[] = "aaabb"
Output : No```
Recommended Practice

Observe if the length of the string is greater than or equal to 10, then every time can split into four parts. Suppose, the length is of 10, then string of length 1, 2, 3, 4 can be made.
For string having length less than 10, we can use brute force i.e iterate through all possible ways of splitting the string and check each one.

```If length is more than 10
return true
Else (If length is less than 10)
Use Brute Force method to check
if we can break it in four distinct
strings.```

Below is the implementation of the above idea.

C++

 `// C++ program to check if we can break a string` `// into four distinct strings.` `#include` `using` `namespace` `std;`   `// Return if the given string can be split or not.` `bool` `check(string s)` `{` `    ``// We can always break a string of size 10 or` `    ``// more into four distinct strings.` `    ``if` `(s.size() >= 10)` `        ``return` `true``;`   `    ``// Brute Force` `    ``for` `(``int` `i =1; i < s.size(); i++)` `    ``{` `        ``for` `(``int` `j = i + 1; j < s.size(); j++)` `        ``{` `            ``for` `(``int` `k = j + 1; k < s.size(); k++)` `            ``{` `                ``// Making 4 string from the given string` `                ``string s1 = s.substr(0, i);` `                ``string s2 = s.substr(i, j - i);` `                ``string s3 = s.substr(j, k - j);` `                ``string s4 = s.substr(k, s.size() - k);`   `                ``// Checking if they are distinct or not.` `                ``if` `(s1 != s2 && s1 != s3 && s1 != s4 &&` `                        ``s2 != s3 && s2 != s4 && s3 != s4)` `                    ``return` `true``;` `            ``}` `        ``}` `    ``}`   `    ``return` `false``;` `}`   `// Driven Program` `int` `main()` `{` `    ``string str = ``"aaabb"``;`   `    ``(check(str))? (cout << ``"Yes"` `<< endl):` `                  ``(cout << ``"No"` `<< endl);`   `    ``return` `0;` `}`

Java

 `// Java program to check if we can break a string ` `// into four distinct strings. ` `class` `GFG` `{`   `    ``// Return true if both strings are equal` `    ``public` `static` `boolean` `strcheck(String s1, String s2) ` `    ``{` `        ``if` `(s1 != s2)` `            ``return` `false``;` `        ``return` `true``;` `    ``}`   `    ``// Return if the given string can be split or not.` `    ``public` `static` `boolean` `check(String s) ` `    ``{` `        ``if` `(s.length() >= ``10``)` `            ``return` `true``;`   `        ``// Brute Force` `        ``for` `(``int` `i = ``1``; i < s.length(); i++) ` `        ``{` `            ``for` `(``int` `j = i + ``1``; j < s.length(); j++) ` `            ``{` `                ``for` `(``int` `k = j + ``1``; k < s.length(); k++) ` `                ``{` `                    `  `                    ``// Making 4 string from the given string` `                    ``String s1 = ``""``, s2 = ``""``, s3 = ``""``, s4 = ``""``;` `                    ``try` `                    ``{` `                        ``s1 = s.substring(``0``, i);` `                        ``s2 = s.substring(i, j - i);` `                        ``s3 = s.substring(j, k - j);` `                        ``s4 = s.substring(k, s.length() - k);` `                    ``} ` `                    ``catch` `(StringIndexOutOfBoundsException e) {` `                    ``}`   `                    ``// Checking if they are distinct or not.` `                    ``if` `(strcheck(s1, s2) && strcheck(s1, s3) && ` `                        ``strcheck(s1, s4) && strcheck(s2, s3) && ` `                        ``strcheck(s2, s4) && strcheck(s3, s4))` `                        ``return` `true``;` `                ``}` `            ``}` `        ``}`   `        ``return` `false``;` `    ``}`   `    ``// Driver code` `    ``public` `static` `void` `main(String[] args)` `    ``{` `        ``String str = ``"aaabb"``;` `        ``if` `(check(str))` `            ``System.out.println(``"Yes"``);` `        ``else` `            ``System.out.println(``"No"``);` `    ``}` `}`   `// This code is contributed by` `// sanjeev2552`

Python3

 `# Python3 program to check if we can ` `# break a into four distinct strings. `   `# Return if the given string can be ` `# split or not. ` `def` `check(s):`   `    ``# We can always break a of size 10 or ` `    ``# more into four distinct strings. ` `    ``if` `(``len``(s) >``=` `10``):` `        ``return` `True`   `    ``# Brute Force ` `    ``for` `i ``in` `range``(``1``, ``len``(s)): ` `    `  `        ``for` `j ``in` `range``(i ``+` `1``, ``len``(s)): ` `        `  `            ``for` `k ``in` `range``(j ``+` `1``, ``len``(s)):` `            `  `                ``# Making 4 from the given ` `                ``s1 ``=` `s[``0``:i] ` `                ``s2 ``=` `s[i:j ``-` `i]` `                ``s3 ``=` `s[j: k ``-` `j]` `                ``s4 ``=` `s[k: ``len``(s) ``-` `k]` `                `  `                ``# Checking if they are distinct or not. ` `                ``if` `(s1 !``=` `s2 ``and` `s1 !``=` `s3 ``and` `s1 !``=` `s4 ``and` `                    ``s2 !``=` `s3 ``and` `s2 !``=` `s4 ``and` `s3 !``=` `s4): ` `                    ``return` `True` `            `  `    ``return` `False`   `# Driver Code ` `if` `__name__ ``=``=` `'__main__'``:` `    ``str` `=` `"aaabb"`   `    ``print``(``"Yes"``) ``if``(check(``str``)) ``else` `print``(``"NO"``)`   `# This code is contributed` `# by SHUBHAMSINGH10`

C#

 `// C# program to check if we can break a string ` `// into four distinct strings. ` `using` `System;` `    `  `class` `GFG` `{`   `    ``// Return true if both strings are equal` `    ``public` `static` `Boolean strcheck(String s1,` `                                   ``String s2) ` `    ``{` `        ``if` `(s1.CompareTo(s2) != 0)` `            ``return` `false``;` `        ``return` `true``;` `    ``}`   `    ``// Return if the given string` `    ``// can be split or not.` `    ``public` `static` `Boolean check(String s) ` `    ``{` `        ``if` `(s.Length >= 10)` `            ``return` `true``;`   `        ``// Brute Force` `        ``for` `(``int` `i = 1; i < s.Length; i++) ` `        ``{` `            ``for` `(``int` `j = i + 1; j < s.Length; j++) ` `            ``{` `                ``for` `(``int` `k = j + 1; k < s.Length; k++) ` `                ``{` `                    `  `                    ``// Making 4 string from the given string` `                    ``String s1 = ``""``, s2 = ``""``, ` `                           ``s3 = ``""``, s4 = ``""``;` `                    ``try` `                    ``{` `                        ``s1 = s.Substring(0, i);` `                        ``s2 = s.Substring(i, j - i);` `                        ``s3 = s.Substring(j, k - j);` `                        ``s4 = s.Substring(k, s.Length - k);` `                    ``} ` `                    ``catch` `(Exception e) {` `                    ``}`   `                    ``// Checking if they are distinct or not.` `                    ``if` `(strcheck(s1, s2) && strcheck(s1, s3) && ` `                        ``strcheck(s1, s4) && strcheck(s2, s3) && ` `                        ``strcheck(s2, s4) && strcheck(s3, s4))` `                        ``return` `true``;` `                ``}` `            ``}` `        ``}` `        ``return` `false``;` `    ``}`   `    ``// Driver code` `    ``public` `static` `void` `Main(String[] args)` `    ``{` `        ``String str = ``"aaabb"``;` `        ``if` `(check(str))` `            ``Console.WriteLine(``"Yes"``);` `        ``else` `            ``Console.WriteLine(``"No"``);` `    ``}` `}`   `// This code is contributed by Princi Singh`

Javascript

 ``

Output

`No`

Time complexity : O(n3
Auxiliary Space : O(n)

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